git.oblomov.eu Git - linux-2.6/blob - drivers/video/imsttfb.c

   1 /*
   2  *  drivers/video/imsttfb.c -- frame buffer device for IMS TwinTurbo
   3  *
   4  *  This file is derived from the powermac console "imstt" driver:
   5  *  Copyright (C) 1997 Sigurdur Asgeirsson
   6  *  With additional hacking by Jeffrey Kuskin (jsk@mojave.stanford.edu)
   7  *  Modified by Danilo Beuche 1998
   8  *  Some register values added by Damien Doligez, INRIA Rocquencourt
   9  *  Various cleanups by Paul Mundt (lethal@chaoticdreams.org)
  10  *
  11  *  This file was written by Ryan Nielsen (ran@krazynet.com)
  12  *  Most of the frame buffer device stuff was copied from atyfb.c
  13  *
  14  *  This file is subject to the terms and conditions of the GNU General Public
  15  *  License. See the file COPYING in the main directory of this archive for
  16  *  more details.
  17  */
  18
  19 #include <linux/module.h>
  20 #include <linux/kernel.h>
  21 #include <linux/errno.h>
  22 #include <linux/string.h>
  23 #include <linux/mm.h>
  24 #include <linux/tty.h>
  25 #include <linux/slab.h>
  26 #include <linux/vmalloc.h>
  27 #include <linux/delay.h>
  28 #include <linux/interrupt.h>
  29 #include <linux/fb.h>
  30 #include <linux/init.h>
  31 #include <linux/pci.h>
  32 #include <asm/io.h>
  33 #include <asm/uaccess.h>
  34
  35 #if defined(CONFIG_PPC)
  36 #include <linux/nvram.h>
  37 #include <asm/prom.h>
  38 #include <asm/pci-bridge.h>
  39 #include "macmodes.h"
  40 #endif
  41
  42 #ifndef __powerpc__
  43 #define eieio()         /* Enforce In-order Execution of I/O */
  44 #endif
  45
  46 /* TwinTurbo (Cosmo) registers */
  47 enum {
  48         S1SA    =  0, /* 0x00 */
  49         S2SA    =  1, /* 0x04 */
  50         SP      =  2, /* 0x08 */
  51         DSA     =  3, /* 0x0C */
  52         CNT     =  4, /* 0x10 */
  53         DP_OCTL =  5, /* 0x14 */
  54         CLR     =  6, /* 0x18 */
  55         BI      =  8, /* 0x20 */
  56         MBC     =  9, /* 0x24 */
  57         BLTCTL  = 10, /* 0x28 */
  58
  59         /* Scan Timing Generator Registers */
  60         HES     = 12, /* 0x30 */
  61         HEB     = 13, /* 0x34 */
  62         HSB     = 14, /* 0x38 */
  63         HT      = 15, /* 0x3C */
  64         VES     = 16, /* 0x40 */
  65         VEB     = 17, /* 0x44 */
  66         VSB     = 18, /* 0x48 */
  67         VT      = 19, /* 0x4C */
  68         HCIV    = 20, /* 0x50 */
  69         VCIV    = 21, /* 0x54 */
  70         TCDR    = 22, /* 0x58 */
  71         VIL     = 23, /* 0x5C */
  72         STGCTL  = 24, /* 0x60 */
  73
  74         /* Screen Refresh Generator Registers */
  75         SSR     = 25, /* 0x64 */
  76         HRIR    = 26, /* 0x68 */
  77         SPR     = 27, /* 0x6C */
  78         CMR     = 28, /* 0x70 */
  79         SRGCTL  = 29, /* 0x74 */
  80
  81         /* RAM Refresh Generator Registers */
  82         RRCIV   = 30, /* 0x78 */
  83         RRSC    = 31, /* 0x7C */
  84         RRCR    = 34, /* 0x88 */
  85
  86         /* System Registers */
  87         GIOE    = 32, /* 0x80 */
  88         GIO     = 33, /* 0x84 */
  89         SCR     = 35, /* 0x8C */
  90         SSTATUS = 36, /* 0x90 */
  91         PRC     = 37, /* 0x94 */
  92
  93 #if 0
  94         /* PCI Registers */
  95         DVID    = 0x00000000L,
  96         SC      = 0x00000004L,
  97         CCR     = 0x00000008L,
  98         OG      = 0x0000000CL,
  99         BARM    = 0x00000010L,
 100         BARER   = 0x00000030L,
 101 #endif
 102 };
 103
 104 /* IBM 624 RAMDAC Direct Registers */
 105 enum {
 106         PADDRW  = 0x00,
 107         PDATA   = 0x04,
 108         PPMASK  = 0x08,
 109         PADDRR  = 0x0c,
 110         PIDXLO  = 0x10,
 111         PIDXHI  = 0x14,
 112         PIDXDATA= 0x18,
 113         PIDXCTL = 0x1c
 114 };
 115
 116 /* IBM 624 RAMDAC Indirect Registers */
 117 enum {
 118         CLKCTL          = 0x02, /* (0x01) Miscellaneous Clock Control */
 119         SYNCCTL         = 0x03, /* (0x00) Sync Control */
 120         HSYNCPOS        = 0x04, /* (0x00) Horizontal Sync Position */
 121         PWRMNGMT        = 0x05, /* (0x00) Power Management */
 122         DACOP           = 0x06, /* (0x02) DAC Operation */
 123         PALETCTL        = 0x07, /* (0x00) Palette Control */
 124         SYSCLKCTL       = 0x08, /* (0x01) System Clock Control */
 125         PIXFMT          = 0x0a, /* () Pixel Format  [bpp >> 3 + 2] */
 126         BPP8            = 0x0b, /* () 8 Bits/Pixel Control */
 127         BPP16           = 0x0c, /* () 16 Bits/Pixel Control  [bit 1=1 for 565] */
 128         BPP24           = 0x0d, /* () 24 Bits/Pixel Control */
 129         BPP32           = 0x0e, /* () 32 Bits/Pixel Control */
 130         PIXCTL1         = 0x10, /* (0x05) Pixel PLL Control 1 */
 131         PIXCTL2         = 0x11, /* (0x00) Pixel PLL Control 2 */
 132         SYSCLKN         = 0x15, /* () System Clock N (System PLL Reference Divider) */
 133         SYSCLKM         = 0x16, /* () System Clock M (System PLL VCO Divider) */
 134         SYSCLKP         = 0x17, /* () System Clock P */
 135         SYSCLKC         = 0x18, /* () System Clock C */
 136         /*
 137          * Dot clock rate is 20MHz * (m + 1) / ((n + 1) * (p ? 2 * p : 1)
 138          * c is charge pump bias which depends on the VCO frequency
 139          */
 140         PIXM0           = 0x20, /* () Pixel M 0 */
 141         PIXN0           = 0x21, /* () Pixel N 0 */
 142         PIXP0           = 0x22, /* () Pixel P 0 */
 143         PIXC0           = 0x23, /* () Pixel C 0 */
 144         CURSCTL         = 0x30, /* (0x00) Cursor Control */
 145         CURSXLO         = 0x31, /* () Cursor X position, low 8 bits */
 146         CURSXHI         = 0x32, /* () Cursor X position, high 8 bits */
 147         CURSYLO         = 0x33, /* () Cursor Y position, low 8 bits */
 148         CURSYHI         = 0x34, /* () Cursor Y position, high 8 bits */
 149         CURSHOTX        = 0x35, /* () Cursor Hot Spot X */
 150         CURSHOTY        = 0x36, /* () Cursor Hot Spot Y */
 151         CURSACCTL       = 0x37, /* () Advanced Cursor Control Enable */
 152         CURSACATTR      = 0x38, /* () Advanced Cursor Attribute */
 153         CURS1R          = 0x40, /* () Cursor 1 Red */
 154         CURS1G          = 0x41, /* () Cursor 1 Green */
 155         CURS1B          = 0x42, /* () Cursor 1 Blue */
 156         CURS2R          = 0x43, /* () Cursor 2 Red */
 157         CURS2G          = 0x44, /* () Cursor 2 Green */
 158         CURS2B          = 0x45, /* () Cursor 2 Blue */
 159         CURS3R          = 0x46, /* () Cursor 3 Red */
 160         CURS3G          = 0x47, /* () Cursor 3 Green */
 161         CURS3B          = 0x48, /* () Cursor 3 Blue */
 162         BORDR           = 0x60, /* () Border Color Red */
 163         BORDG           = 0x61, /* () Border Color Green */
 164         BORDB           = 0x62, /* () Border Color Blue */
 165         MISCTL1         = 0x70, /* (0x00) Miscellaneous Control 1 */
 166         MISCTL2         = 0x71, /* (0x00) Miscellaneous Control 2 */
 167         MISCTL3         = 0x72, /* (0x00) Miscellaneous Control 3 */
 168         KEYCTL          = 0x78  /* (0x00) Key Control/DB Operation */
 169 };
 170
 171 /* TI TVP 3030 RAMDAC Direct Registers */
 172 enum {
 173         TVPADDRW = 0x00,        /* 0  Palette/Cursor RAM Write Address/Index */
 174         TVPPDATA = 0x04,        /* 1  Palette Data RAM Data */
 175         TVPPMASK = 0x08,        /* 2  Pixel Read-Mask */
 176         TVPPADRR = 0x0c,        /* 3  Palette/Cursor RAM Read Address */
 177         TVPCADRW = 0x10,        /* 4  Cursor/Overscan Color Write Address */
 178         TVPCDATA = 0x14,        /* 5  Cursor/Overscan Color Data */
 179                                 /* 6  reserved */
 180         TVPCADRR = 0x1c,        /* 7  Cursor/Overscan Color Read Address */
 181                                 /* 8  reserved */
 182         TVPDCCTL = 0x24,        /* 9  Direct Cursor Control */
 183         TVPIDATA = 0x28,        /* 10 Index Data */
 184         TVPCRDAT = 0x2c,        /* 11 Cursor RAM Data */
 185         TVPCXPOL = 0x30,        /* 12 Cursor-Position X LSB */
 186         TVPCXPOH = 0x34,        /* 13 Cursor-Position X MSB */
 187         TVPCYPOL = 0x38,        /* 14 Cursor-Position Y LSB */
 188         TVPCYPOH = 0x3c,        /* 15 Cursor-Position Y MSB */
 189 };
 190
 191 /* TI TVP 3030 RAMDAC Indirect Registers */
 192 enum {
 193         TVPIRREV = 0x01,        /* Silicon Revision [RO] */
 194         TVPIRICC = 0x06,        /* Indirect Cursor Control      (0x00) */
 195         TVPIRBRC = 0x07,        /* Byte Router Control  (0xe4) */
 196         TVPIRLAC = 0x0f,        /* Latch Control                (0x06) */
 197         TVPIRTCC = 0x18,        /* True Color Control   (0x80) */
 198         TVPIRMXC = 0x19,        /* Multiplex Control            (0x98) */
 199         TVPIRCLS = 0x1a,        /* Clock Selection              (0x07) */
 200         TVPIRPPG = 0x1c,        /* Palette Page         (0x00) */
 201         TVPIRGEC = 0x1d,        /* General Control              (0x00) */
 202         TVPIRMIC = 0x1e,        /* Miscellaneous Control        (0x00) */
 203         TVPIRPLA = 0x2c,        /* PLL Address */
 204         TVPIRPPD = 0x2d,        /* Pixel Clock PLL Data */
 205         TVPIRMPD = 0x2e,        /* Memory Clock PLL Data */
 206         TVPIRLPD = 0x2f,        /* Loop Clock PLL Data */
 207         TVPIRCKL = 0x30,        /* Color-Key Overlay Low */
 208         TVPIRCKH = 0x31,        /* Color-Key Overlay High */
 209         TVPIRCRL = 0x32,        /* Color-Key Red Low */
 210         TVPIRCRH = 0x33,        /* Color-Key Red High */
 211         TVPIRCGL = 0x34,        /* Color-Key Green Low */
 212         TVPIRCGH = 0x35,        /* Color-Key Green High */
 213         TVPIRCBL = 0x36,        /* Color-Key Blue Low */
 214         TVPIRCBH = 0x37,        /* Color-Key Blue High */
 215         TVPIRCKC = 0x38,        /* Color-Key Control            (0x00) */
 216         TVPIRMLC = 0x39,        /* MCLK/Loop Clock Control      (0x18) */
 217         TVPIRSEN = 0x3a,        /* Sense Test                   (0x00) */
 218         TVPIRTMD = 0x3b,        /* Test Mode Data */
 219         TVPIRRML = 0x3c,        /* CRC Remainder LSB [RO] */
 220         TVPIRRMM = 0x3d,        /* CRC Remainder MSB [RO] */
 221         TVPIRRMS = 0x3e,        /* CRC  Bit Select [WO] */
 222         TVPIRDID = 0x3f,        /* Device ID [RO]               (0x30) */
 223         TVPIRRES = 0xff         /* Software Reset [WO] */
 224 };
 225
 226 struct initvalues {
 227         __u8 addr, value;
 228 };
 229
 230 static struct initvalues ibm_initregs[] __devinitdata = {
 231         { CLKCTL,       0x21 },
 232         { SYNCCTL,      0x00 },
 233         { HSYNCPOS,     0x00 },
 234         { PWRMNGMT,     0x00 },
 235         { DACOP,        0x02 },
 236         { PALETCTL,     0x00 },
 237         { SYSCLKCTL,    0x01 },
 238
 239         /*
 240          * Note that colors in X are correct only if all video data is
 241          * passed through the palette in the DAC.  That is, "indirect
 242          * color" must be configured.  This is the case for the IBM DAC
 243          * used in the 2MB and 4MB cards, at least.
 244          */
 245         { BPP8,         0x00 },
 246         { BPP16,        0x01 },
 247         { BPP24,        0x00 },
 248         { BPP32,        0x00 },
 249
 250         { PIXCTL1,      0x05 },
 251         { PIXCTL2,      0x00 },
 252         { SYSCLKN,      0x08 },
 253         { SYSCLKM,      0x4f },
 254         { SYSCLKP,      0x00 },
 255         { SYSCLKC,      0x00 },
 256         { CURSCTL,      0x00 },
 257         { CURSACCTL,    0x01 },
 258         { CURSACATTR,   0xa8 },
 259         { CURS1R,       0xff },
 260         { CURS1G,       0xff },
 261         { CURS1B,       0xff },
 262         { CURS2R,       0xff },
 263         { CURS2G,       0xff },
 264         { CURS2B,       0xff },
 265         { CURS3R,       0xff },
 266         { CURS3G,       0xff },
 267         { CURS3B,       0xff },
 268         { BORDR,        0xff },
 269         { BORDG,        0xff },
 270         { BORDB,        0xff },
 271         { MISCTL1,      0x01 },
 272         { MISCTL2,      0x45 },
 273         { MISCTL3,      0x00 },
 274         { KEYCTL,       0x00 }
 275 };
 276
 277 static struct initvalues tvp_initregs[] __devinitdata = {
 278         { TVPIRICC,     0x00 },
 279         { TVPIRBRC,     0xe4 },
 280         { TVPIRLAC,     0x06 },
 281         { TVPIRTCC,     0x80 },
 282         { TVPIRMXC,     0x4d },
 283         { TVPIRCLS,     0x05 },
 284         { TVPIRPPG,     0x00 },
 285         { TVPIRGEC,     0x00 },
 286         { TVPIRMIC,     0x08 },
 287         { TVPIRCKL,     0xff },
 288         { TVPIRCKH,     0xff },
 289         { TVPIRCRL,     0xff },
 290         { TVPIRCRH,     0xff },
 291         { TVPIRCGL,     0xff },
 292         { TVPIRCGH,     0xff },
 293         { TVPIRCBL,     0xff },
 294         { TVPIRCBH,     0xff },
 295         { TVPIRCKC,     0x00 },
 296         { TVPIRPLA,     0x00 },
 297         { TVPIRPPD,     0xc0 },
 298         { TVPIRPPD,     0xd5 },
 299         { TVPIRPPD,     0xea },
 300         { TVPIRPLA,     0x00 },
 301         { TVPIRMPD,     0xb9 },
 302         { TVPIRMPD,     0x3a },
 303         { TVPIRMPD,     0xb1 },
 304         { TVPIRPLA,     0x00 },
 305         { TVPIRLPD,     0xc1 },
 306         { TVPIRLPD,     0x3d },
 307         { TVPIRLPD,     0xf3 },
 308 };
 309
 310 struct imstt_regvals {
 311         __u32 pitch;
 312         __u16 hes, heb, hsb, ht, ves, veb, vsb, vt, vil;
 313         __u8 pclk_m, pclk_n, pclk_p;
 314         /* Values of the tvp which change depending on colormode x resolution */
 315         __u8 mlc[3];    /* Memory Loop Config 0x39 */
 316         __u8 lckl_p[3]; /* P value of LCKL PLL */
 317 };
 318
 319 struct imstt_par {
 320         struct imstt_regvals init;
 321         __u32 __iomem *dc_regs;
 322         unsigned long cmap_regs_phys;
 323         __u8 *cmap_regs;
 324         __u32 ramdac;
 325         __u32 palette[16];
 326 };
 327
 328 enum {
 329         IBM = 0,
 330         TVP = 1
 331 };
 332
 333 #define USE_NV_MODES            1
 334 #define INIT_BPP                8
 335 #define INIT_XRES               640
 336 #define INIT_YRES               480
 337
 338 static int inverse = 0;
 339 static char fontname[40] __initdata = { 0 };
 340 #if defined(CONFIG_PPC)
 341 static signed char init_vmode __devinitdata = -1, init_cmode __devinitdata = -1;
 342 #endif
 343
 344 static struct imstt_regvals tvp_reg_init_2 = {
 345         512,
 346         0x0002, 0x0006, 0x0026, 0x0028, 0x0003, 0x0016, 0x0196, 0x0197, 0x0196,
 347         0xec, 0x2a, 0xf3,
 348         { 0x3c, 0x3b, 0x39 }, { 0xf3, 0xf3, 0xf3 }
 349 };
 350
 351 static struct imstt_regvals tvp_reg_init_6 = {
 352         640,
 353         0x0004, 0x0009, 0x0031, 0x0036, 0x0003, 0x002a, 0x020a, 0x020d, 0x020a,
 354         0xef, 0x2e, 0xb2,
 355         { 0x39, 0x39, 0x38 }, { 0xf3, 0xf3, 0xf3 }
 356 };
 357
 358 static struct imstt_regvals tvp_reg_init_12 = {
 359         800,
 360         0x0005, 0x000e, 0x0040, 0x0042, 0x0003, 0x018, 0x270, 0x271, 0x270,
 361         0xf6, 0x2e, 0xf2,
 362         { 0x3a, 0x39, 0x38 }, { 0xf3, 0xf3, 0xf3 }
 363 };
 364
 365 static struct imstt_regvals tvp_reg_init_13 = {
 366         832,
 367         0x0004, 0x0011, 0x0045, 0x0048, 0x0003, 0x002a, 0x029a, 0x029b, 0x0000,
 368         0xfe, 0x3e, 0xf1,
 369         { 0x39, 0x38, 0x38 }, { 0xf3, 0xf3, 0xf2 }
 370 };
 371
 372 static struct imstt_regvals tvp_reg_init_17 = {
 373         1024,
 374         0x0006, 0x0210, 0x0250, 0x0053, 0x1003, 0x0021, 0x0321, 0x0324, 0x0000,
 375         0xfc, 0x3a, 0xf1,
 376         { 0x39, 0x38, 0x38 }, { 0xf3, 0xf3, 0xf2 }
 377 };
 378
 379 static struct imstt_regvals tvp_reg_init_18 = {
 380         1152,
 381         0x0009, 0x0011, 0x059, 0x5b, 0x0003, 0x0031, 0x0397, 0x039a, 0x0000,
 382         0xfd, 0x3a, 0xf1,
 383         { 0x39, 0x38, 0x38 }, { 0xf3, 0xf3, 0xf2 }
 384 };
 385
 386 static struct imstt_regvals tvp_reg_init_19 = {
 387         1280,
 388         0x0009, 0x0016, 0x0066, 0x0069, 0x0003, 0x0027, 0x03e7, 0x03e8, 0x03e7,
 389         0xf7, 0x36, 0xf0,
 390         { 0x38, 0x38, 0x38 }, { 0xf3, 0xf2, 0xf1 }
 391 };
 392
 393 static struct imstt_regvals tvp_reg_init_20 = {
 394         1280,
 395         0x0009, 0x0018, 0x0068, 0x006a, 0x0003, 0x0029, 0x0429, 0x042a, 0x0000,
 396         0xf0, 0x2d, 0xf0,
 397         { 0x38, 0x38, 0x38 }, { 0xf3, 0xf2, 0xf1 }
 398 };
 399
 400 /*
 401  * PCI driver prototypes
 402  */
 403 static int imsttfb_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
 404 static void imsttfb_remove(struct pci_dev *pdev);
 405
 406 /*
 407  * Register access
 408  */
 409 static inline u32 read_reg_le32(volatile u32 __iomem *base, int regindex)
 410 {
 411 #ifdef __powerpc__
 412         return in_le32(base + regindex);
 413 #else
 414         return readl(base + regindex);
 415 #endif
 416 }
 417
 418 static inline void write_reg_le32(volatile u32 __iomem *base, int regindex, u32 val)
 419 {
 420 #ifdef __powerpc__
 421         out_le32(base + regindex, val);
 422 #else
 423         writel(val, base + regindex);
 424 #endif
 425 }
 426
 427 static __u32
 428 getclkMHz(struct imstt_par *par)
 429 {
 430         __u32 clk_m, clk_n, clk_p;
 431
 432         clk_m = par->init.pclk_m;
 433         clk_n = par->init.pclk_n;
 434         clk_p = par->init.pclk_p;
 435
 436         return 20 * (clk_m + 1) / ((clk_n + 1) * (clk_p ? 2 * clk_p : 1));
 437 }
 438
 439 static void
 440 setclkMHz(struct imstt_par *par, __u32 MHz)
 441 {
 442         __u32 clk_m, clk_n, x, stage, spilled;
 443
 444         clk_m = clk_n = 0;
 445         stage = spilled = 0;
 446         for (;;) {
 447                 switch (stage) {
 448                         case 0:
 449                                 clk_m++;
 450                                 break;
 451                         case 1:
 452                                 clk_n++;
 453                                 break;
 454                 }
 455                 x = 20 * (clk_m + 1) / (clk_n + 1);
 456                 if (x == MHz)
 457                         break;
 458                 if (x > MHz) {
 459                         spilled = 1;
 460                         stage = 1;
 461                 } else if (spilled && x < MHz) {
 462                         stage = 0;
 463                 }
 464         }
 465
 466         par->init.pclk_m = clk_m;
 467         par->init.pclk_n = clk_n;
 468         par->init.pclk_p = 0;
 469 }
 470
 471 static struct imstt_regvals *
 472 compute_imstt_regvals_ibm(struct imstt_par *par, int xres, int yres)
 473 {
 474         struct imstt_regvals *init = &par->init;
 475         __u32 MHz, hes, heb, veb, htp, vtp;
 476
 477         switch (xres) {
 478                 case 640:
 479                         hes = 0x0008; heb = 0x0012; veb = 0x002a; htp = 10; vtp = 2;
 480                         MHz = 30 /* .25 */ ;
 481                         break;
 482                 case 832:
 483                         hes = 0x0005; heb = 0x0020; veb = 0x0028; htp = 8; vtp = 3;
 484                         MHz = 57 /* .27_ */ ;
 485                         break;
 486                 case 1024:
 487                         hes = 0x000a; heb = 0x001c; veb = 0x0020; htp = 8; vtp = 3;
 488                         MHz = 80;
 489                         break;
 490                 case 1152:
 491                         hes = 0x0012; heb = 0x0022; veb = 0x0031; htp = 4; vtp = 3;
 492                         MHz = 101 /* .6_ */ ;
 493                         break;
 494                 case 1280:
 495                         hes = 0x0012; heb = 0x002f; veb = 0x0029; htp = 4; vtp = 1;
 496                         MHz = yres == 960 ? 126 : 135;
 497                         break;
 498                 case 1600:
 499                         hes = 0x0018; heb = 0x0040; veb = 0x002a; htp = 4; vtp = 3;
 500                         MHz = 200;
 501                         break;
 502                 default:
 503                         return NULL;
 504         }
 505
 506         setclkMHz(par, MHz);
 507
 508         init->hes = hes;
 509         init->heb = heb;
 510         init->hsb = init->heb + (xres >> 3);
 511         init->ht = init->hsb + htp;
 512         init->ves = 0x0003;
 513         init->veb = veb;
 514         init->vsb = init->veb + yres;
 515         init->vt = init->vsb + vtp;
 516         init->vil = init->vsb;
 517
 518         init->pitch = xres;
 519         return init;
 520 }
 521
 522 static struct imstt_regvals *
 523 compute_imstt_regvals_tvp(struct imstt_par *par, int xres, int yres)
 524 {
 525         struct imstt_regvals *init;
 526
 527         switch (xres) {
 528                 case 512:
 529                         init = &tvp_reg_init_2;
 530                         break;
 531                 case 640:
 532                         init = &tvp_reg_init_6;
 533                         break;
 534                 case 800:
 535                         init = &tvp_reg_init_12;
 536                         break;
 537                 case 832:
 538                         init = &tvp_reg_init_13;
 539                         break;
 540                 case 1024:
 541                         init = &tvp_reg_init_17;
 542                         break;
 543                 case 1152:
 544                         init = &tvp_reg_init_18;
 545                         break;
 546                 case 1280:
 547                         init = yres == 960 ? &tvp_reg_init_19 : &tvp_reg_init_20;
 548                         break;
 549                 default:
 550                         return NULL;
 551         }
 552         par->init = *init;
 553         return init;
 554 }
 555
 556 static struct imstt_regvals *
 557 compute_imstt_regvals (struct imstt_par *par, u_int xres, u_int yres)
 558 {
 559         if (par->ramdac == IBM)
 560                 return compute_imstt_regvals_ibm(par, xres, yres);
 561         else
 562                 return compute_imstt_regvals_tvp(par, xres, yres);
 563 }
 564
 565 static void
 566 set_imstt_regvals_ibm (struct imstt_par *par, u_int bpp)
 567 {
 568         struct imstt_regvals *init = &par->init;
 569         __u8 pformat = (bpp >> 3) + 2;
 570
 571         par->cmap_regs[PIDXHI] = 0;             eieio();
 572         par->cmap_regs[PIDXLO] = PIXM0;         eieio();
 573         par->cmap_regs[PIDXDATA] = init->pclk_m;eieio();
 574         par->cmap_regs[PIDXLO] = PIXN0;         eieio();
 575         par->cmap_regs[PIDXDATA] = init->pclk_n;eieio();
 576         par->cmap_regs[PIDXLO] = PIXP0;         eieio();
 577         par->cmap_regs[PIDXDATA] = init->pclk_p;eieio();
 578         par->cmap_regs[PIDXLO] = PIXC0;         eieio();
 579         par->cmap_regs[PIDXDATA] = 0x02;        eieio();
 580
 581         par->cmap_regs[PIDXLO] = PIXFMT;        eieio();
 582         par->cmap_regs[PIDXDATA] = pformat;     eieio();
 583 }
 584
 585 static void
 586 set_imstt_regvals_tvp (struct imstt_par *par, u_int bpp)
 587 {
 588         struct imstt_regvals *init = &par->init;
 589         __u8 tcc, mxc, lckl_n, mic;
 590         __u8 mlc, lckl_p;
 591
 592         switch (bpp) {
 593                 default:
 594                 case 8:
 595                         tcc = 0x80;
 596                         mxc = 0x4d;
 597                         lckl_n = 0xc1;
 598                         mlc = init->mlc[0];
 599                         lckl_p = init->lckl_p[0];
 600                         break;
 601                 case 16:
 602                         tcc = 0x44;
 603                         mxc = 0x55;
 604                         lckl_n = 0xe1;
 605                         mlc = init->mlc[1];
 606                         lckl_p = init->lckl_p[1];
 607                         break;
 608                 case 24:
 609                         tcc = 0x5e;
 610                         mxc = 0x5d;
 611                         lckl_n = 0xf1;
 612                         mlc = init->mlc[2];
 613                         lckl_p = init->lckl_p[2];
 614                         break;
 615                 case 32:
 616                         tcc = 0x46;
 617                         mxc = 0x5d;
 618                         lckl_n = 0xf1;
 619                         mlc = init->mlc[2];
 620                         lckl_p = init->lckl_p[2];
 621                         break;
 622         }
 623         mic = 0x08;
 624
 625         par->cmap_regs[TVPADDRW] = TVPIRPLA;            eieio();
 626         par->cmap_regs[TVPIDATA] = 0x00;                eieio();
 627         par->cmap_regs[TVPADDRW] = TVPIRPPD;            eieio();
 628         par->cmap_regs[TVPIDATA] = init->pclk_m;        eieio();
 629         par->cmap_regs[TVPADDRW] = TVPIRPPD;            eieio();
 630         par->cmap_regs[TVPIDATA] = init->pclk_n;        eieio();
 631         par->cmap_regs[TVPADDRW] = TVPIRPPD;            eieio();
 632         par->cmap_regs[TVPIDATA] = init->pclk_p;        eieio();
 633
 634         par->cmap_regs[TVPADDRW] = TVPIRTCC;            eieio();
 635         par->cmap_regs[TVPIDATA] = tcc;                 eieio();
 636         par->cmap_regs[TVPADDRW] = TVPIRMXC;            eieio();
 637         par->cmap_regs[TVPIDATA] = mxc;                 eieio();
 638         par->cmap_regs[TVPADDRW] = TVPIRMIC;            eieio();
 639         par->cmap_regs[TVPIDATA] = mic;                 eieio();
 640
 641         par->cmap_regs[TVPADDRW] = TVPIRPLA;            eieio();
 642         par->cmap_regs[TVPIDATA] = 0x00;                eieio();
 643         par->cmap_regs[TVPADDRW] = TVPIRLPD;            eieio();
 644         par->cmap_regs[TVPIDATA] = lckl_n;              eieio();
 645
 646         par->cmap_regs[TVPADDRW] = TVPIRPLA;            eieio();
 647         par->cmap_regs[TVPIDATA] = 0x15;                eieio();
 648         par->cmap_regs[TVPADDRW] = TVPIRMLC;            eieio();
 649         par->cmap_regs[TVPIDATA] = mlc;                 eieio();
 650
 651         par->cmap_regs[TVPADDRW] = TVPIRPLA;            eieio();
 652         par->cmap_regs[TVPIDATA] = 0x2a;                eieio();
 653         par->cmap_regs[TVPADDRW] = TVPIRLPD;            eieio();
 654         par->cmap_regs[TVPIDATA] = lckl_p;              eieio();
 655 }
 656
 657 static void
 658 set_imstt_regvals (struct fb_info *info, u_int bpp)
 659 {
 660         struct imstt_par *par = info->par;
 661         struct imstt_regvals *init = &par->init;
 662         __u32 ctl, pitch, byteswap, scr;
 663
 664         if (par->ramdac == IBM)
 665                 set_imstt_regvals_ibm(par, bpp);
 666         else
 667                 set_imstt_regvals_tvp(par, bpp);
 668
 669   /*
 670    * From what I (jsk) can gather poking around with MacsBug,
 671    * bits 8 and 9 in the SCR register control endianness
 672    * correction (byte swapping).  These bits must be set according
 673    * to the color depth as follows:
 674    *     Color depth    Bit 9   Bit 8
 675    *     ==========     =====   =====
 676    *        8bpp          0       0
 677    *       16bpp          0       1
 678    *       32bpp          1       1
 679    */
 680         switch (bpp) {
 681                 default:
 682                 case 8:
 683                         ctl = 0x17b1;
 684                         pitch = init->pitch >> 2;
 685                         byteswap = 0x000;
 686                         break;
 687                 case 16:
 688                         ctl = 0x17b3;
 689                         pitch = init->pitch >> 1;
 690                         byteswap = 0x100;
 691                         break;
 692                 case 24:
 693                         ctl = 0x17b9;
 694                         pitch = init->pitch - (init->pitch >> 2);
 695                         byteswap = 0x200;
 696                         break;
 697                 case 32:
 698                         ctl = 0x17b5;
 699                         pitch = init->pitch;
 700                         byteswap = 0x300;
 701                         break;
 702         }
 703         if (par->ramdac == TVP)
 704                 ctl -= 0x30;
 705
 706         write_reg_le32(par->dc_regs, HES, init->hes);
 707         write_reg_le32(par->dc_regs, HEB, init->heb);
 708         write_reg_le32(par->dc_regs, HSB, init->hsb);
 709         write_reg_le32(par->dc_regs, HT, init->ht);
 710         write_reg_le32(par->dc_regs, VES, init->ves);
 711         write_reg_le32(par->dc_regs, VEB, init->veb);
 712         write_reg_le32(par->dc_regs, VSB, init->vsb);
 713         write_reg_le32(par->dc_regs, VT, init->vt);
 714         write_reg_le32(par->dc_regs, VIL, init->vil);
 715         write_reg_le32(par->dc_regs, HCIV, 1);
 716         write_reg_le32(par->dc_regs, VCIV, 1);
 717         write_reg_le32(par->dc_regs, TCDR, 4);
 718         write_reg_le32(par->dc_regs, RRCIV, 1);
 719         write_reg_le32(par->dc_regs, RRSC, 0x980);
 720         write_reg_le32(par->dc_regs, RRCR, 0x11);
 721
 722         if (par->ramdac == IBM) {
 723                 write_reg_le32(par->dc_regs, HRIR, 0x0100);
 724                 write_reg_le32(par->dc_regs, CMR, 0x00ff);
 725                 write_reg_le32(par->dc_regs, SRGCTL, 0x0073);
 726         } else {
 727                 write_reg_le32(par->dc_regs, HRIR, 0x0200);
 728                 write_reg_le32(par->dc_regs, CMR, 0x01ff);
 729                 write_reg_le32(par->dc_regs, SRGCTL, 0x0003);
 730         }
 731
 732         switch (info->fix.smem_len) {
 733                 case 0x200000:
 734                         scr = 0x059d | byteswap;
 735                         break;
 736                 /* case 0x400000:
 737                    case 0x800000: */
 738                 default:
 739                         pitch >>= 1;
 740                         scr = 0x150dd | byteswap;
 741                         break;
 742         }
 743
 744         write_reg_le32(par->dc_regs, SCR, scr);
 745         write_reg_le32(par->dc_regs, SPR, pitch);
 746         write_reg_le32(par->dc_regs, STGCTL, ctl);
 747 }
 748
 749 static inline void
 750 set_offset (struct fb_var_screeninfo *var, struct fb_info *info)
 751 {
 752         struct imstt_par *par = info->par;
 753         __u32 off = var->yoffset * (info->fix.line_length >> 3)
 754                     + ((var->xoffset * (var->bits_per_pixel >> 3)) >> 3);
 755         write_reg_le32(par->dc_regs, SSR, off);
 756 }
 757
 758 static inline void
 759 set_555 (struct imstt_par *par)
 760 {
 761         if (par->ramdac == IBM) {
 762                 par->cmap_regs[PIDXHI] = 0;             eieio();
 763                 par->cmap_regs[PIDXLO] = BPP16;         eieio();
 764                 par->cmap_regs[PIDXDATA] = 0x01;        eieio();
 765         } else {
 766                 par->cmap_regs[TVPADDRW] = TVPIRTCC;    eieio();
 767                 par->cmap_regs[TVPIDATA] = 0x44;        eieio();
 768         }
 769 }
 770
 771 static inline void
 772 set_565 (struct imstt_par *par)
 773 {
 774         if (par->ramdac == IBM) {
 775                 par->cmap_regs[PIDXHI] = 0;             eieio();
 776                 par->cmap_regs[PIDXLO] = BPP16;         eieio();
 777                 par->cmap_regs[PIDXDATA] = 0x03;        eieio();
 778         } else {
 779                 par->cmap_regs[TVPADDRW] = TVPIRTCC;    eieio();
 780                 par->cmap_regs[TVPIDATA] = 0x45;        eieio();
 781         }
 782 }
 783
 784 static int
 785 imsttfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 786 {
 787         if ((var->bits_per_pixel != 8 && var->bits_per_pixel != 16
 788             && var->bits_per_pixel != 24 && var->bits_per_pixel != 32)
 789             || var->xres_virtual < var->xres || var->yres_virtual < var->yres
 790             || var->nonstd
 791             || (var->vmode & FB_VMODE_MASK) != FB_VMODE_NONINTERLACED)
 792                 return -EINVAL;
 793
 794         if ((var->xres * var->yres) * (var->bits_per_pixel >> 3) > info->fix.smem_len
 795             || (var->xres_virtual * var->yres_virtual) * (var->bits_per_pixel >> 3) > info->fix.smem_len)
 796                 return -EINVAL;
 797
 798         switch (var->bits_per_pixel) {
 799                 case 8:
 800                         var->red.offset = 0;
 801                         var->red.length = 8;
 802                         var->green.offset = 0;
 803                         var->green.length = 8;
 804                         var->blue.offset = 0;
 805                         var->blue.length = 8;
 806                         var->transp.offset = 0;
 807                         var->transp.length = 0;
 808                         break;
 809                 case 16:        /* RGB 555 or 565 */
 810                         if (var->green.length != 6)
 811                                 var->red.offset = 10;
 812                         var->red.length = 5;
 813                         var->green.offset = 5;
 814                         if (var->green.length != 6)
 815                                 var->green.length = 5;
 816                         var->blue.offset = 0;
 817                         var->blue.length = 5;
 818                         var->transp.offset = 0;
 819                         var->transp.length = 0;
 820                         break;
 821                 case 24:        /* RGB 888 */
 822                         var->red.offset = 16;
 823                         var->red.length = 8;
 824                         var->green.offset = 8;
 825                         var->green.length = 8;
 826                         var->blue.offset = 0;
 827                         var->blue.length = 8;
 828                         var->transp.offset = 0;
 829                         var->transp.length = 0;
 830                         break;
 831                 case 32:        /* RGBA 8888 */
 832                         var->red.offset = 16;
 833                         var->red.length = 8;
 834                         var->green.offset = 8;
 835                         var->green.length = 8;
 836                         var->blue.offset = 0;
 837                         var->blue.length = 8;
 838                         var->transp.offset = 24;
 839                         var->transp.length = 8;
 840                         break;
 841         }
 842
 843         if (var->yres == var->yres_virtual) {
 844                 __u32 vram = (info->fix.smem_len - (PAGE_SIZE << 2));
 845                 var->yres_virtual = ((vram << 3) / var->bits_per_pixel) / var->xres_virtual;
 846                 if (var->yres_virtual < var->yres)
 847                         var->yres_virtual = var->yres;
 848         }
 849
 850         var->red.msb_right = 0;
 851         var->green.msb_right = 0;
 852         var->blue.msb_right = 0;
 853         var->transp.msb_right = 0;
 854         var->height = -1;
 855         var->width = -1;
 856         var->vmode = FB_VMODE_NONINTERLACED;
 857         var->left_margin = var->right_margin = 16;
 858         var->upper_margin = var->lower_margin = 16;
 859         var->hsync_len = var->vsync_len = 8;
 860         return 0;
 861 }
 862
 863 static int
 864 imsttfb_set_par(struct fb_info *info)
 865 {
 866         struct imstt_par *par = info->par;
 867
 868         if (!compute_imstt_regvals(par, info->var.xres, info->var.yres))
 869                 return -EINVAL;
 870
 871         if (info->var.green.length == 6)
 872                 set_565(par);
 873         else
 874                 set_555(par);
 875         set_imstt_regvals(info, info->var.bits_per_pixel);
 876         info->var.pixclock = 1000000 / getclkMHz(par);
 877         return 0;
 878 }
 879
 880 static int
 881 imsttfb_setcolreg (u_int regno, u_int red, u_int green, u_int blue,
 882                    u_int transp, struct fb_info *info)
 883 {
 884         struct imstt_par *par = info->par;
 885         u_int bpp = info->var.bits_per_pixel;
 886
 887         if (regno > 255)
 888                 return 1;
 889
 890         red >>= 8;
 891         green >>= 8;
 892         blue >>= 8;
 893
 894         /* PADDRW/PDATA are the same as TVPPADDRW/TVPPDATA */
 895         if (0 && bpp == 16)     /* screws up X */
 896                 par->cmap_regs[PADDRW] = regno << 3;
 897         else
 898                 par->cmap_regs[PADDRW] = regno;
 899         eieio();
 900
 901         par->cmap_regs[PDATA] = red;    eieio();
 902         par->cmap_regs[PDATA] = green;  eieio();
 903         par->cmap_regs[PDATA] = blue;   eieio();
 904
 905         if (regno < 16)
 906                 switch (bpp) {
 907                         case 16:
 908                                 par->palette[regno] =
 909                                         (regno << (info->var.green.length ==
 910                                         5 ? 10 : 11)) | (regno << 5) | regno;
 911                                 break;
 912                         case 24:
 913                                 par->palette[regno] =
 914                                         (regno << 16) | (regno << 8) | regno;
 915                                 break;
 916                         case 32: {
 917                                 int i = (regno << 8) | regno;
 918                                 par->palette[regno] = (i << 16) |i;
 919                                 break;
 920                         }
 921                 }
 922         return 0;
 923 }
 924
 925 static int
 926 imsttfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
 927 {
 928         if (var->xoffset + info->var.xres > info->var.xres_virtual
 929             || var->yoffset + info->var.yres > info->var.yres_virtual)
 930                 return -EINVAL;
 931
 932         info->var.xoffset = var->xoffset;
 933         info->var.yoffset = var->yoffset;
 934         set_offset(var, info);
 935         return 0;
 936 }
 937
 938 static int
 939 imsttfb_blank(int blank, struct fb_info *info)
 940 {
 941         struct imstt_par *par = info->par;
 942         __u32 ctrl;
 943
 944         ctrl = read_reg_le32(par->dc_regs, STGCTL);
 945         if (blank > 0) {
 946                 switch (blank) {
 947                 case FB_BLANK_NORMAL:
 948                 case FB_BLANK_POWERDOWN:
 949                         ctrl &= ~0x00000380;
 950                         if (par->ramdac == IBM) {
 951                                 par->cmap_regs[PIDXHI] = 0;             eieio();
 952                                 par->cmap_regs[PIDXLO] = MISCTL2;       eieio();
 953                                 par->cmap_regs[PIDXDATA] = 0x55;        eieio();
 954                                 par->cmap_regs[PIDXLO] = MISCTL1;       eieio();
 955                                 par->cmap_regs[PIDXDATA] = 0x11;        eieio();
 956                                 par->cmap_regs[PIDXLO] = SYNCCTL;       eieio();
 957                                 par->cmap_regs[PIDXDATA] = 0x0f;        eieio();
 958                                 par->cmap_regs[PIDXLO] = PWRMNGMT;      eieio();
 959                                 par->cmap_regs[PIDXDATA] = 0x1f;        eieio();
 960                                 par->cmap_regs[PIDXLO] = CLKCTL;        eieio();
 961                                 par->cmap_regs[PIDXDATA] = 0xc0;
 962                         }
 963                         break;
 964                 case FB_BLANK_VSYNC_SUSPEND:
 965                         ctrl &= ~0x00000020;
 966                         break;
 967                 case FB_BLANK_HSYNC_SUSPEND:
 968                         ctrl &= ~0x00000010;
 969                         break;
 970                 }
 971         } else {
 972                 if (par->ramdac == IBM) {
 973                         ctrl |= 0x000017b0;
 974                         par->cmap_regs[PIDXHI] = 0;             eieio();
 975                         par->cmap_regs[PIDXLO] = CLKCTL;        eieio();
 976                         par->cmap_regs[PIDXDATA] = 0x01;        eieio();
 977                         par->cmap_regs[PIDXLO] = PWRMNGMT;      eieio();
 978                         par->cmap_regs[PIDXDATA] = 0x00;        eieio();
 979                         par->cmap_regs[PIDXLO] = SYNCCTL;       eieio();
 980                         par->cmap_regs[PIDXDATA] = 0x00;        eieio();
 981                         par->cmap_regs[PIDXLO] = MISCTL1;       eieio();
 982                         par->cmap_regs[PIDXDATA] = 0x01;        eieio();
 983                         par->cmap_regs[PIDXLO] = MISCTL2;       eieio();
 984                         par->cmap_regs[PIDXDATA] = 0x45;        eieio();
 985                 } else
 986                         ctrl |= 0x00001780;
 987         }
 988         write_reg_le32(par->dc_regs, STGCTL, ctrl);
 989         return 0;
 990 }
 991
 992 static void
 993 imsttfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
 994 {
 995         struct imstt_par *par = info->par;
 996         __u32 Bpp, line_pitch, bgc, dx, dy, width, height;
 997
 998         bgc = rect->color;
 999         bgc |= (bgc << 8);
1000         bgc |= (bgc << 16);
1001
1002         Bpp = info->var.bits_per_pixel >> 3,
1003         line_pitch = info->fix.line_length;
1004
1005         dy = rect->dy * line_pitch;
1006         dx = rect->dx * Bpp;
1007         height = rect->height;
1008         height--;
1009         width = rect->width * Bpp;
1010         width--;
1011
1012         if (rect->rop == ROP_COPY) {
1013                 while(read_reg_le32(par->dc_regs, SSTATUS) & 0x80);
1014                 write_reg_le32(par->dc_regs, DSA, dy + dx);
1015                 write_reg_le32(par->dc_regs, CNT, (height << 16) | width);
1016                 write_reg_le32(par->dc_regs, DP_OCTL, line_pitch);
1017                 write_reg_le32(par->dc_regs, BI, 0xffffffff);
1018                 write_reg_le32(par->dc_regs, MBC, 0xffffffff);
1019                 write_reg_le32(par->dc_regs, CLR, bgc);
1020                 write_reg_le32(par->dc_regs, BLTCTL, 0x840); /* 0x200000 */
1021                 while(read_reg_le32(par->dc_regs, SSTATUS) & 0x80);
1022                 while(read_reg_le32(par->dc_regs, SSTATUS) & 0x40);
1023         } else {
1024                 while(read_reg_le32(par->dc_regs, SSTATUS) & 0x80);
1025                 write_reg_le32(par->dc_regs, DSA, dy + dx);
1026                 write_reg_le32(par->dc_regs, S1SA, dy + dx);
1027                 write_reg_le32(par->dc_regs, CNT, (height << 16) | width);
1028                 write_reg_le32(par->dc_regs, DP_OCTL, line_pitch);
1029                 write_reg_le32(par->dc_regs, SP, line_pitch);
1030                 write_reg_le32(par->dc_regs, BLTCTL, 0x40005);
1031                 while(read_reg_le32(par->dc_regs, SSTATUS) & 0x80);
1032                 while(read_reg_le32(par->dc_regs, SSTATUS) & 0x40);
1033         }
1034 }
1035
1036 static void
1037 imsttfb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
1038 {
1039         struct imstt_par *par = info->par;
1040         __u32 Bpp, line_pitch, fb_offset_old, fb_offset_new, sp, dp_octl;
1041         __u32 cnt, bltctl, sx, sy, dx, dy, height, width;
1042
1043         Bpp = info->var.bits_per_pixel >> 3,
1044
1045         sx = area->sx * Bpp;
1046         sy = area->sy;
1047         dx = area->dx * Bpp;
1048         dy = area->dy;
1049         height = area->height;
1050         height--;
1051         width = area->width * Bpp;
1052         width--;
1053
1054         line_pitch = info->fix.line_length;
1055         bltctl = 0x05;
1056         sp = line_pitch << 16;
1057         cnt = height << 16;
1058
1059         if (sy < dy) {
1060                 sy += height;
1061                 dy += height;
1062                 sp |= -(line_pitch) & 0xffff;
1063                 dp_octl = -(line_pitch) & 0xffff;
1064         } else {
1065                 sp |= line_pitch;
1066                 dp_octl = line_pitch;
1067         }
1068         if (sx < dx) {
1069                 sx += width;
1070                 dx += width;
1071                 bltctl |= 0x80;
1072                 cnt |= -(width) & 0xffff;
1073         } else {
1074                 cnt |= width;
1075         }
1076         fb_offset_old = sy * line_pitch + sx;
1077         fb_offset_new = dy * line_pitch + dx;
1078
1079         while(read_reg_le32(par->dc_regs, SSTATUS) & 0x80);
1080         write_reg_le32(par->dc_regs, S1SA, fb_offset_old);
1081         write_reg_le32(par->dc_regs, SP, sp);
1082         write_reg_le32(par->dc_regs, DSA, fb_offset_new);
1083         write_reg_le32(par->dc_regs, CNT, cnt);
1084         write_reg_le32(par->dc_regs, DP_OCTL, dp_octl);
1085         write_reg_le32(par->dc_regs, BLTCTL, bltctl);
1086         while(read_reg_le32(par->dc_regs, SSTATUS) & 0x80);
1087         while(read_reg_le32(par->dc_regs, SSTATUS) & 0x40);
1088 }
1089
1090 #if 0
1091 static int
1092 imsttfb_load_cursor_image(struct imstt_par *par, int width, int height, __u8 fgc)
1093 {
1094         u_int x, y;
1095
1096         if (width > 32 || height > 32)
1097                 return -EINVAL;
1098
1099         if (par->ramdac == IBM) {
1100                 par->cmap_regs[PIDXHI] = 1;     eieio();
1101                 for (x = 0; x < 0x100; x++) {
1102                         par->cmap_regs[PIDXLO] = x;             eieio();
1103                         par->cmap_regs[PIDXDATA] = 0x00;        eieio();
1104                 }
1105                 par->cmap_regs[PIDXHI] = 1;     eieio();
1106                 for (y = 0; y < height; y++)
1107                         for (x = 0; x < width >> 2; x++) {
1108                                 par->cmap_regs[PIDXLO] = x + y * 8;     eieio();
1109                                 par->cmap_regs[PIDXDATA] = 0xff;        eieio();
1110                         }
1111                 par->cmap_regs[PIDXHI] = 0;             eieio();
1112                 par->cmap_regs[PIDXLO] = CURS1R;        eieio();
1113                 par->cmap_regs[PIDXDATA] = fgc;         eieio();
1114                 par->cmap_regs[PIDXLO] = CURS1G;        eieio();
1115                 par->cmap_regs[PIDXDATA] = fgc;         eieio();
1116                 par->cmap_regs[PIDXLO] = CURS1B;        eieio();
1117                 par->cmap_regs[PIDXDATA] = fgc;         eieio();
1118                 par->cmap_regs[PIDXLO] = CURS2R;        eieio();
1119                 par->cmap_regs[PIDXDATA] = fgc;         eieio();
1120                 par->cmap_regs[PIDXLO] = CURS2G;        eieio();
1121                 par->cmap_regs[PIDXDATA] = fgc;         eieio();
1122                 par->cmap_regs[PIDXLO] = CURS2B;        eieio();
1123                 par->cmap_regs[PIDXDATA] = fgc;         eieio();
1124                 par->cmap_regs[PIDXLO] = CURS3R;        eieio();
1125                 par->cmap_regs[PIDXDATA] = fgc;         eieio();
1126                 par->cmap_regs[PIDXLO] = CURS3G;        eieio();
1127                 par->cmap_regs[PIDXDATA] = fgc;         eieio();
1128                 par->cmap_regs[PIDXLO] = CURS3B;        eieio();
1129                 par->cmap_regs[PIDXDATA] = fgc;         eieio();
1130         } else {
1131                 par->cmap_regs[TVPADDRW] = TVPIRICC;    eieio();
1132                 par->cmap_regs[TVPIDATA] &= 0x03;       eieio();
1133                 par->cmap_regs[TVPADDRW] = 0;           eieio();
1134                 for (x = 0; x < 0x200; x++) {
1135                         par->cmap_regs[TVPCRDAT] = 0x00;        eieio();
1136                 }
1137                 for (x = 0; x < 0x200; x++) {
1138                         par->cmap_regs[TVPCRDAT] = 0xff;        eieio();
1139                 }
1140                 par->cmap_regs[TVPADDRW] = TVPIRICC;    eieio();
1141                 par->cmap_regs[TVPIDATA] &= 0x03;       eieio();
1142                 for (y = 0; y < height; y++)
1143                         for (x = 0; x < width >> 3; x++) {
1144                                 par->cmap_regs[TVPADDRW] = x + y * 8;   eieio();
1145                                 par->cmap_regs[TVPCRDAT] = 0xff;                eieio();
1146                         }
1147                 par->cmap_regs[TVPADDRW] = TVPIRICC;    eieio();
1148                 par->cmap_regs[TVPIDATA] |= 0x08;       eieio();
1149                 for (y = 0; y < height; y++)
1150                         for (x = 0; x < width >> 3; x++) {
1151                                 par->cmap_regs[TVPADDRW] = x + y * 8;   eieio();
1152                                 par->cmap_regs[TVPCRDAT] = 0xff;                eieio();
1153                         }
1154                 par->cmap_regs[TVPCADRW] = 0x00;        eieio();
1155                 for (x = 0; x < 12; x++)
1156                         par->cmap_regs[TVPCDATA] = fgc; eieio();
1157         }
1158         return 1;
1159 }
1160
1161 static void
1162 imstt_set_cursor(struct imstt_par *par, struct fb_image *d, int on)
1163 {
1164         if (par->ramdac == IBM) {
1165                 par->cmap_regs[PIDXHI] = 0;     eieio();
1166                 if (!on) {
1167                         par->cmap_regs[PIDXLO] = CURSCTL;       eieio();
1168                         par->cmap_regs[PIDXDATA] = 0x00;        eieio();
1169                 } else {
1170                         par->cmap_regs[PIDXLO] = CURSXHI;       eieio();
1171                         par->cmap_regs[PIDXDATA] = d->dx >> 8;  eieio();
1172                         par->cmap_regs[PIDXLO] = CURSXLO;       eieio();
1173                         par->cmap_regs[PIDXDATA] = d->dx & 0xff;eieio();
1174                         par->cmap_regs[PIDXLO] = CURSYHI;       eieio();
1175                         par->cmap_regs[PIDXDATA] = d->dy >> 8;  eieio();
1176                         par->cmap_regs[PIDXLO] = CURSYLO;       eieio();
1177                         par->cmap_regs[PIDXDATA] = d->dy & 0xff;eieio();
1178                         par->cmap_regs[PIDXLO] = CURSCTL;       eieio();
1179                         par->cmap_regs[PIDXDATA] = 0x02;        eieio();
1180                 }
1181         } else {
1182                 if (!on) {
1183                         par->cmap_regs[TVPADDRW] = TVPIRICC;    eieio();
1184                         par->cmap_regs[TVPIDATA] = 0x00;        eieio();
1185                 } else {
1186                         __u16 x = d->dx + 0x40, y = d->dy + 0x40;
1187
1188                         par->cmap_regs[TVPCXPOH] = x >> 8;      eieio();
1189                         par->cmap_regs[TVPCXPOL] = x & 0xff;    eieio();
1190                         par->cmap_regs[TVPCYPOH] = y >> 8;      eieio();
1191                         par->cmap_regs[TVPCYPOL] = y & 0xff;    eieio();
1192                         par->cmap_regs[TVPADDRW] = TVPIRICC;    eieio();
1193                         par->cmap_regs[TVPIDATA] = 0x02;        eieio();
1194                 }
1195         }
1196 }
1197
1198 static int
1199 imsttfb_cursor(struct fb_info *info, struct fb_cursor *cursor)
1200 {
1201         struct imstt_par *par = info->par;
1202         u32 flags = cursor->set, fg, bg, xx, yy;
1203
1204         if (cursor->dest == NULL && cursor->rop == ROP_XOR)
1205                 return 1;
1206
1207         imstt_set_cursor(info, cursor, 0);
1208
1209         if (flags & FB_CUR_SETPOS) {
1210                 xx = cursor->image.dx - info->var.xoffset;
1211                 yy = cursor->image.dy - info->var.yoffset;
1212         }
1213
1214         if (flags & FB_CUR_SETSIZE) {
1215         }
1216
1217         if (flags & (FB_CUR_SETSHAPE | FB_CUR_SETCMAP)) {
1218                 int fg_idx = cursor->image.fg_color;
1219                 int width = (cursor->image.width+7)/8;
1220                 u8 *dat = (u8 *) cursor->image.data;
1221                 u8 *dst = (u8 *) cursor->dest;
1222                 u8 *msk = (u8 *) cursor->mask;
1223
1224                 switch (cursor->rop) {
1225                 case ROP_XOR:
1226                         for (i = 0; i < cursor->image.height; i++) {
1227                                 for (j = 0; j < width; j++) {
1228                                         d_idx = i * MAX_CURS/8  + j;
1229                                         data[d_idx] =  byte_rev[dat[s_idx] ^
1230                                                                 dst[s_idx]];
1231                                         mask[d_idx] = byte_rev[msk[s_idx]];
1232                                         s_idx++;
1233                                 }
1234                         }
1235                         break;
1236                 case ROP_COPY:
1237                 default:
1238                         for (i = 0; i < cursor->image.height; i++) {
1239                                 for (j = 0; j < width; j++) {
1240                                         d_idx = i * MAX_CURS/8 + j;
1241                                         data[d_idx] = byte_rev[dat[s_idx]];
1242                                         mask[d_idx] = byte_rev[msk[s_idx]];
1243                                         s_idx++;
1244                                 }
1245                         }
1246                         break;
1247                 }
1248
1249                 fg = ((info->cmap.red[fg_idx] & 0xf8) << 7) |
1250                      ((info->cmap.green[fg_idx] & 0xf8) << 2) |
1251                      ((info->cmap.blue[fg_idx] & 0xf8) >> 3) | 1 << 15;
1252
1253                 imsttfb_load_cursor_image(par, xx, yy, fgc);
1254         }
1255         if (cursor->enable)
1256                 imstt_set_cursor(info, cursor, 1);
1257         return 0;
1258 }
1259 #endif
1260
1261 #define FBIMSTT_SETREG          0x545401
1262 #define FBIMSTT_GETREG          0x545402
1263 #define FBIMSTT_SETCMAPREG      0x545403
1264 #define FBIMSTT_GETCMAPREG      0x545404
1265 #define FBIMSTT_SETIDXREG       0x545405
1266 #define FBIMSTT_GETIDXREG       0x545406
1267
1268 static int
1269 imsttfb_ioctl(struct fb_info *info, u_int cmd, u_long arg)
1270 {
1271         struct imstt_par *par = info->par;
1272         void __user *argp = (void __user *)arg;
1273         __u32 reg[2];
1274         __u8 idx[2];
1275
1276         switch (cmd) {
1277                 case FBIMSTT_SETREG:
1278                         if (copy_from_user(reg, argp, 8) || reg[0] > (0x1000 - sizeof(reg[0])) / sizeof(reg[0]))
1279                                 return -EFAULT;
1280                         write_reg_le32(par->dc_regs, reg[0], reg[1]);
1281                         return 0;
1282                 case FBIMSTT_GETREG:
1283                         if (copy_from_user(reg, argp, 4) || reg[0] > (0x1000 - sizeof(reg[0])) / sizeof(reg[0]))
1284                                 return -EFAULT;
1285                         reg[1] = read_reg_le32(par->dc_regs, reg[0]);
1286                         if (copy_to_user((void __user *)(arg + 4), &reg[1], 4))
1287                                 return -EFAULT;
1288                         return 0;
1289                 case FBIMSTT_SETCMAPREG:
1290                         if (copy_from_user(reg, argp, 8) || reg[0] > (0x1000 - sizeof(reg[0])) / sizeof(reg[0]))
1291                                 return -EFAULT;
1292                         write_reg_le32(((u_int __iomem *)par->cmap_regs), reg[0], reg[1]);
1293                         return 0;
1294                 case FBIMSTT_GETCMAPREG:
1295                         if (copy_from_user(reg, argp, 4) || reg[0] > (0x1000 - sizeof(reg[0])) / sizeof(reg[0]))
1296                                 return -EFAULT;
1297                         reg[1] = read_reg_le32(((u_int __iomem *)par->cmap_regs), reg[0]);
1298                         if (copy_to_user((void __user *)(arg + 4), &reg[1], 4))
1299                                 return -EFAULT;
1300                         return 0;
1301                 case FBIMSTT_SETIDXREG:
1302                         if (copy_from_user(idx, argp, 2))
1303                                 return -EFAULT;
1304                         par->cmap_regs[PIDXHI] = 0;             eieio();
1305                         par->cmap_regs[PIDXLO] = idx[0];        eieio();
1306                         par->cmap_regs[PIDXDATA] = idx[1];      eieio();
1307                         return 0;
1308                 case FBIMSTT_GETIDXREG:
1309                         if (copy_from_user(idx, argp, 1))
1310                                 return -EFAULT;
1311                         par->cmap_regs[PIDXHI] = 0;             eieio();
1312                         par->cmap_regs[PIDXLO] = idx[0];        eieio();
1313                         idx[1] = par->cmap_regs[PIDXDATA];
1314                         if (copy_to_user((void __user *)(arg + 1), &idx[1], 1))
1315                                 return -EFAULT;
1316                         return 0;
1317                 default:
1318                         return -ENOIOCTLCMD;
1319         }
1320 }
1321
1322 static struct pci_device_id imsttfb_pci_tbl[] = {
1323         { PCI_VENDOR_ID_IMS, PCI_DEVICE_ID_IMS_TT128,
1324           PCI_ANY_ID, PCI_ANY_ID, 0, 0, IBM },
1325         { PCI_VENDOR_ID_IMS, PCI_DEVICE_ID_IMS_TT3D,
1326           PCI_ANY_ID, PCI_ANY_ID, 0, 0, TVP },
1327         { 0, }
1328 };
1329
1330 MODULE_DEVICE_TABLE(pci, imsttfb_pci_tbl);
1331
1332 static struct pci_driver imsttfb_pci_driver = {
1333         .name =         "imsttfb",
1334         .id_table =     imsttfb_pci_tbl,
1335         .probe =        imsttfb_probe,
1336         .remove =       __devexit_p(imsttfb_remove),
1337 };
1338
1339 static struct fb_ops imsttfb_ops = {
1340         .owner          = THIS_MODULE,
1341         .fb_check_var   = imsttfb_check_var,
1342         .fb_set_par     = imsttfb_set_par,
1343         .fb_setcolreg   = imsttfb_setcolreg,
1344         .fb_pan_display = imsttfb_pan_display,
1345         .fb_blank       = imsttfb_blank,
1346         .fb_fillrect    = imsttfb_fillrect,
1347         .fb_copyarea    = imsttfb_copyarea,
1348         .fb_imageblit   = cfb_imageblit,
1349         .fb_ioctl       = imsttfb_ioctl,
1350 };
1351
1352 static void __devinit
1353 init_imstt(struct fb_info *info)
1354 {
1355         struct imstt_par *par = info->par;
1356         __u32 i, tmp, *ip, *end;
1357
1358         tmp = read_reg_le32(par->dc_regs, PRC);
1359         if (par->ramdac == IBM)
1360                 info->fix.smem_len = (tmp & 0x0004) ? 0x400000 : 0x200000;
1361         else
1362                 info->fix.smem_len = 0x800000;
1363
1364         ip = (__u32 *)info->screen_base;
1365         end = (__u32 *)(info->screen_base + info->fix.smem_len);
1366         while (ip < end)
1367                 *ip++ = 0;
1368
1369         /* initialize the card */
1370         tmp = read_reg_le32(par->dc_regs, STGCTL);
1371         write_reg_le32(par->dc_regs, STGCTL, tmp & ~0x1);
1372         write_reg_le32(par->dc_regs, SSR, 0);
1373
1374         /* set default values for DAC registers */
1375         if (par->ramdac == IBM) {
1376                 par->cmap_regs[PPMASK] = 0xff;
1377                 eieio();
1378                 par->cmap_regs[PIDXHI] = 0;
1379                 eieio();
1380                 for (i = 0; i < ARRAY_SIZE(ibm_initregs); i++) {
1381                         par->cmap_regs[PIDXLO] = ibm_initregs[i].addr;
1382                         eieio();
1383                         par->cmap_regs[PIDXDATA] = ibm_initregs[i].value;
1384                         eieio();
1385                 }
1386         } else {
1387                 for (i = 0; i < ARRAY_SIZE(tvp_initregs); i++) {
1388                         par->cmap_regs[TVPADDRW] = tvp_initregs[i].addr;
1389                         eieio();
1390                         par->cmap_regs[TVPIDATA] = tvp_initregs[i].value;
1391                         eieio();
1392                 }
1393         }
1394
1395 #if USE_NV_MODES && defined(CONFIG_PPC)
1396         {
1397                 int vmode = init_vmode, cmode = init_cmode;
1398
1399                 if (vmode == -1) {
1400                         vmode = nvram_read_byte(NV_VMODE);
1401                         if (vmode <= 0 || vmode > VMODE_MAX)
1402                                 vmode = VMODE_640_480_67;
1403                 }
1404                 if (cmode == -1) {
1405                         cmode = nvram_read_byte(NV_CMODE);
1406                         if (cmode < CMODE_8 || cmode > CMODE_32)
1407                                 cmode = CMODE_8;
1408                 }
1409                 if (mac_vmode_to_var(vmode, cmode, &info->var)) {
1410                         info->var.xres = info->var.xres_virtual = INIT_XRES;
1411                         info->var.yres = info->var.yres_virtual = INIT_YRES;
1412                         info->var.bits_per_pixel = INIT_BPP;
1413                 }
1414         }
1415 #else
1416         info->var.xres = info->var.xres_virtual = INIT_XRES;
1417         info->var.yres = info->var.yres_virtual = INIT_YRES;
1418         info->var.bits_per_pixel = INIT_BPP;
1419 #endif
1420
1421         if ((info->var.xres * info->var.yres) * (info->var.bits_per_pixel >> 3) > info->fix.smem_len
1422             || !(compute_imstt_regvals(par, info->var.xres, info->var.yres))) {
1423                 printk("imsttfb: %ux%ux%u not supported\n", info->var.xres, info->var.yres, info->var.bits_per_pixel);
1424                 framebuffer_release(info);
1425                 return;
1426         }
1427
1428         sprintf(info->fix.id, "IMS TT (%s)", par->ramdac == IBM ? "IBM" : "TVP");
1429         info->fix.mmio_len = 0x1000;
1430         info->fix.accel = FB_ACCEL_IMS_TWINTURBO;
1431         info->fix.type = FB_TYPE_PACKED_PIXELS;
1432         info->fix.visual = info->var.bits_per_pixel == 8 ? FB_VISUAL_PSEUDOCOLOR
1433                                                         : FB_VISUAL_DIRECTCOLOR;
1434         info->fix.line_length = info->var.xres * (info->var.bits_per_pixel >> 3);
1435         info->fix.xpanstep = 8;
1436         info->fix.ypanstep = 1;
1437         info->fix.ywrapstep = 0;
1438
1439         info->var.accel_flags = FB_ACCELF_TEXT;
1440
1441 //      if (par->ramdac == IBM)
1442 //              imstt_cursor_init(info);
1443         if (info->var.green.length == 6)
1444                 set_565(par);
1445         else
1446                 set_555(par);
1447         set_imstt_regvals(info, info->var.bits_per_pixel);
1448
1449         info->var.pixclock = 1000000 / getclkMHz(par);
1450
1451         info->fbops = &imsttfb_ops;
1452         info->flags = FBINFO_DEFAULT |
1453                       FBINFO_HWACCEL_COPYAREA |
1454                       FBINFO_HWACCEL_FILLRECT |
1455                       FBINFO_HWACCEL_YPAN;
1456
1457         fb_alloc_cmap(&info->cmap, 0, 0);
1458
1459         if (register_framebuffer(info) < 0) {
1460                 framebuffer_release(info);
1461                 return;
1462         }
1463
1464         tmp = (read_reg_le32(par->dc_regs, SSTATUS) & 0x0f00) >> 8;
1465         printk("fb%u: %s frame buffer; %uMB vram; chip version %u\n",
1466                 info->node, info->fix.id, info->fix.smem_len >> 20, tmp);
1467 }
1468
1469 static int __devinit
1470 imsttfb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1471 {
1472         unsigned long addr, size;
1473         struct imstt_par *par;
1474         struct fb_info *info;
1475 #ifdef CONFIG_PPC_OF
1476         struct device_node *dp;
1477
1478         dp = pci_device_to_OF_node(pdev);
1479         if(dp)
1480                 printk(KERN_INFO "%s: OF name %s\n",__FUNCTION__, dp->name);
1481         else
1482                 printk(KERN_ERR "imsttfb: no OF node for pci device\n");
1483 #endif /* CONFIG_PPC_OF */
1484
1485         info = framebuffer_alloc(sizeof(struct imstt_par), &pdev->dev);
1486
1487         if (!info) {
1488                 printk(KERN_ERR "imsttfb: Can't allocate memory\n");
1489                 return -ENOMEM;
1490         }
1491
1492         par = info->par;
1493
1494         addr = pci_resource_start (pdev, 0);
1495         size = pci_resource_len (pdev, 0);
1496
1497         if (!request_mem_region(addr, size, "imsttfb")) {
1498                 printk(KERN_ERR "imsttfb: Can't reserve memory region\n");
1499                 framebuffer_release(info);
1500                 return -ENODEV;
1501         }
1502
1503         switch (pdev->device) {
1504                 case PCI_DEVICE_ID_IMS_TT128: /* IMS,tt128mbA */
1505                         par->ramdac = IBM;
1506 #ifdef CONFIG_PPC_OF
1507                         if (dp && ((strcmp(dp->name, "IMS,tt128mb8") == 0) ||
1508                                    (strcmp(dp->name, "IMS,tt128mb8A") == 0)))
1509                                 par->ramdac = TVP;
1510 #endif /* CONFIG_PPC_OF */
1511                         break;
1512                 case PCI_DEVICE_ID_IMS_TT3D:  /* IMS,tt3d */
1513                         par->ramdac = TVP;
1514                         break;
1515                 default:
1516                         printk(KERN_INFO "imsttfb: Device 0x%x unknown, "
1517                                          "contact maintainer.\n", pdev->device);
1518                         release_mem_region(addr, size);
1519                         framebuffer_release(info);
1520                         return -ENODEV;
1521         }
1522
1523         info->fix.smem_start = addr;
1524         info->screen_base = (__u8 *)ioremap(addr, par->ramdac == IBM ?
1525                                             0x400000 : 0x800000);
1526         info->fix.mmio_start = addr + 0x800000;
1527         par->dc_regs = ioremap(addr + 0x800000, 0x1000);
1528         par->cmap_regs_phys = addr + 0x840000;
1529         par->cmap_regs = (__u8 *)ioremap(addr + 0x840000, 0x1000);
1530         info->pseudo_palette = par->palette;
1531         init_imstt(info);
1532
1533         pci_set_drvdata(pdev, info);
1534         return 0;
1535 }
1536
1537 static void __devexit
1538 imsttfb_remove(struct pci_dev *pdev)
1539 {
1540         struct fb_info *info = pci_get_drvdata(pdev);
1541         struct imstt_par *par = info->par;
1542         int size = pci_resource_len(pdev, 0);
1543
1544         unregister_framebuffer(info);
1545         iounmap(par->cmap_regs);
1546         iounmap(par->dc_regs);
1547         iounmap(info->screen_base);
1548         release_mem_region(info->fix.smem_start, size);
1549         framebuffer_release(info);
1550 }
1551
1552 #ifndef MODULE
1553 static int __init
1554 imsttfb_setup(char *options)
1555 {
1556         char *this_opt;
1557
1558         if (!options || !*options)
1559                 return 0;
1560
1561         while ((this_opt = strsep(&options, ",")) != NULL) {
1562                 if (!strncmp(this_opt, "font:", 5)) {
1563                         char *p;
1564                         int i;
1565
1566                         p = this_opt + 5;
1567                         for (i = 0; i < sizeof(fontname) - 1; i++)
1568                                 if (!*p || *p == ' ' || *p == ',')
1569                                         break;
1570                         memcpy(fontname, this_opt + 5, i);
1571                         fontname[i] = 0;
1572                 } else if (!strncmp(this_opt, "inverse", 7)) {
1573                         inverse = 1;
1574                         fb_invert_cmaps();
1575                 }
1576 #if defined(CONFIG_PPC)
1577                 else if (!strncmp(this_opt, "vmode:", 6)) {
1578                         int vmode = simple_strtoul(this_opt+6, NULL, 0);
1579                         if (vmode > 0 && vmode <= VMODE_MAX)
1580                                 init_vmode = vmode;
1581                 } else if (!strncmp(this_opt, "cmode:", 6)) {
1582                         int cmode = simple_strtoul(this_opt+6, NULL, 0);
1583                         switch (cmode) {
1584                                 case CMODE_8:
1585                                 case 8:
1586                                         init_cmode = CMODE_8;
1587                                         break;
1588                                 case CMODE_16:
1589                                 case 15:
1590                                 case 16:
1591                                         init_cmode = CMODE_16;
1592                                         break;
1593                                 case CMODE_32:
1594                                 case 24:
1595                                 case 32:
1596                                         init_cmode = CMODE_32;
1597                                         break;
1598                         }
1599                 }
1600 #endif
1601         }
1602         return 0;
1603 }
1604
1605 #endif /* MODULE */
1606
1607 static int __init imsttfb_init(void)
1608 {
1609 #ifndef MODULE
1610         char *option = NULL;
1611
1612         if (fb_get_options("imsttfb", &option))
1613                 return -ENODEV;
1614
1615         imsttfb_setup(option);
1616 #endif
1617         return pci_register_driver(&imsttfb_pci_driver);
1618 }
1619
1620 static void __exit imsttfb_exit(void)
1621 {
1622         pci_unregister_driver(&imsttfb_pci_driver);
1623 }
1624
1625 MODULE_LICENSE("GPL");
1626
1627 module_init(imsttfb_init);
1628 module_exit(imsttfb_exit);
1629